Back in mid-June, US intelligence services learned about the armed action planned by the leader of PMC Wagner Yevgeny Prigozhin, The Washington Post writes.

According to the media outlet, citing its source, “there were enough signals to be able to tell the leadership … that something was up … So I think they were ready for it.”

CNN, citing sources, reported earlier that American intelligence believed that the head of PMC Wagner, Yevgeny Prigozhin, had long "been planning a major challenge to Russia’s military leadership."

Earlier this week, intelligence officials briefed Congressional leaders on Wagner's movements and "equipment build-up near Russia," the sources said.
On June 23, statements appeared on the Telegram channel of the PMC Wagner that an air attack had been carried out on the PMC. The blame was placed on the Russian military leadership. Wagner Head Yevgeny Prigozhin promised to "restore justice." The Russian Defense Ministry denied the attack allegations, and the Federal Security Service opened a criminal case against the Prigozhin on charges of inciting an armed rebellion.
Prigozhin later said he had taken control of Rostov's military facilities, including the airfield. Later, there were reports that all key facilities in Voronezh were also taken under the control of PMC Wagner.

Late on the evening of June 24, Prigozhin announced that PMC Wagner was deploying its columns and leaving in the opposite direction to the field camps.